Improvement in governors



G. B. SMITH.

Governor.

N PETERS. PHOTO-UTHOGPAPNER, WASHINGTON. D C.

UNITED STATES PATENT OEEIoE.

CHARLES B. SMITH, OF NEWARK, NEW JERSEY.

IMPROVEMENT IN GOVERNORS.

Specification forming part of Letters Patent No. 206,692, dated August6, 1878; application filed January 14, 1878.

To all whom it may concern:

Be it known that I, CHARLES B. SMITH, of Newark, in the county of Essexand State of New Jersey, have invented a new and useful ImprovementinAutomatic Out-Offs for Steam- Engines, of which the following is aspecification:

The object of my invention is to provide a simple and effective means ofmoving the eccentric of a steam-engine across the shaft toward and fromthe center, to decrease and increase the throw of the eccentric, as theduty required of the engine may determine by the necessity for a greateror less admission of steam to the cylinder, by a longer or shorter throwof the valve, my device acting as a gov ernor to the engine.

My improvement is fully set forth in the following specification,reference being had to the accompanying drawings.

Upon the main shaft of the engine (shown at letter F) a face-plate(shown at letter A) is secured. Attached to this face-plate by andswinging on the bearings, shown at E and E is the slotted eccentricshown at letter C, with its connecting weighted arm B and the oppositeweighted arm B. These arms have extensions (shown at G and G) withteeth, forming racks. A gear (shown at D) is fitted to the shaft F,moving freely thereon, the teeth of which gear coincide with the teethof the racks shown at G and G. Springs (shown at H and H.,) or acoil-spring moving the gear, are attached to the swinging arms, and bytheir tension draw the arms toward each other.

The operation of the device is as follows The eccentric is so set thatwhen the springs H and H have drawn the arms together the maximum throwof the eccentric is obtained. The rotation of the shaft, causing thefaceplate A to revolve with the parts attached, gives a centrifugalforce to the weighted arms B and B, overcoming the tension of thesprings H and H, and moving the eccentric 0 across the shaft F towardthe center, lessening the throw of the eccentric until by theequilibrium of the forces the proper speed of the engine is obtained.

The gear D,acting in the racks G andG, retains the weighted arms B and Bin their rel ative positions by preventing the movement of one except ascontrolled by the other.

The advantages secured by my device are simplicity of construction,durability of parts, and absence of friction.

I claim as my invention- 1. The weighted arms B and B, with attachedeccentric, connected and moving substantially as described.

2. The arrangement of the moving slotted eccentric B G with the oppositeweighted arm 13, the gear D, springs H and H, and faceplate A,substantially as described and set forth.

CHARLES B. SMITH.

WVitnesses:

I. W. SMITH, F. W. Rroonn.

